Since 6th November 2008, students in Taiwan have launched a sit-in movement against the "Parade and Assembly Law" which contradicts the Constitution Law. The movement fights for the human rights and the democracy in Taiwan.

In March 1984, he founded Freedom Era Weekly, and declared that "[it was] fighting for 100 percent freedom of speech." Cheng Nan-jung had registered 18 different magazine licenses, as "spare tires" for use when the KMT banned the magazine and suspended publication. He said "I'm not scared of arrest nor of being killed, basically, I'll fight them to the very end."